Pttel-eeed system eor



July 10, 192s. 1,676,751

L. E. VAN HISE FUEL FEED SYSTEM FOR INTERNAL COMBUSTION ENGINES VFiled May l2, 1925 INVENTOR LS TE7 E YAM/ISE BY Patented July 10, 1928.

UNITE :stares iaisi PA'l'i". f l y LEs'iEE E. vAN HIsE, oF ALTADENA, cALiEoENiA, fissiGNoE 'ro JAMEsv. BALDWIN,

' .0E Los ANGELES, CALIFORNIA, y l i y FUEL-FEED sxsfrEivi Eon iN'rEENAL-c oiuisusfr''10NENGINES.y 'i

" l.My invention is designed for use in transferringfluid from onelocation to,y anyy other desired location. More particularly, it is de- 5 tank on a-inotor vehicle to the .carburetorfof an internal-combustion engine carried by the vehicle to move it. i i 1 v The main object ofmy 4invention is toprovide a simpleandeectivefuel feed device l which will be automatic in its operation and vwill require little-or no attention to keepit operative." i' -f Other obj ects apparent as the 15 proceeds.

Inthe drawing z.-y .v Figure. 1 illustrates in `elevation myv invention as applied to the power unit of a motor vehicle; .and

Figure 2 is a fragmentary cross sectional. view of my improved fuel feeding apparatus. fInthe drawing, A designates `a;inotorvehicle provided with an internal combustion engine 1 having" the .usual carburetor 2, storage tankf, and exhaust manifold r4. l The means for transferring fuel from this tank 3 to the carburetor 2,.includes afheat pump l) comprising a tubular well 5 closed at one end thereof and having a screwthreaded stud -6 projecting from `this Aend and having.. its -open `end 7 screw threaded.-This well or bottlef passes'ithrough an opening 8 in the exhaust manifold 4 andi is secured therein by a nut 9 engaging the screwthreads ofthe 'stud 6 which passes through a suitable aperture in the manifold 4. i Between its ends, the bottle 5 is provided ywith an annularv flange 10 which forms a closure seat ,for the `bottle within the manifold 4 when the nut .9 40 is drawn up tight on tlie stud 6.

A T-head' 11 "has yits l-middle branch 12 ofthe inventionA will become detailed description thereof lscrewed onto the end' 7 of the-bottle 5, and

has pipes 13 and 14 fixed to and extending 'from its other branches "15` and 16, respectively. The other endy of pipe 13v is connected to one end of al check valve Von-the end of a fuel conducting pipe 17 leading from the mainvsupplyv tank Pipe 14. hasfV its other end connected to 'a similar valve V1 fixed to. the head 18 Aof the auxiliary storage tank 19. This tank l19-is fixed 'in any con-vV venieni; position onl the vehicle to cause fuel te time* therriffrem .by gravity tothe'. carbure:

Appiication mei May 12, i925. serial No; 29,822.

tor 2. As shown in the drawing, tank 19 is secured 4to the' .vehicles dashboard D ,by

v ka band 20,'and 'isconnect'ed by an overiio'w signed for transferrinoV fuel from a storage vp ipe 2]Y to the supply tankpandby a pipe 22to the carburetor 2. I The check .valves V andVlQare of the `common spring controlled ball type, but may ybe of any :other suitable ftype and need be used only on the auxiliary tank side'of fuel to flow from themain tank to the pump P and the tank19 only, and seat to prevent l theflow of fuelinthe opposite direction.

j Within the bettlemember 5, a second ytubuthe Vheat pumpif desired. These,valves act in thegsame direction; lthat is, theyunseat to permit is adjustably suspended concentrically witli-` in membery 5 by a screw, 24 vengaging. the

jclosed ,end 25 ofk lie member v23. The, bottle 5 extends for about one-lialf of its length outside Iof theexhaust duct 4-aiid the niember 23 extends partly within `andV 4,partly without this duct 4 with the space in' bottle 5 above the end. 25 lforming an adjustable .fuel cooling and condensing chamber.

The operation of the apparatus is somve- 'what as follows: Assumingthat all the parts of .the transferring apparatus are initiallyprimed; when the engine is started, the-heat i fromthe 4exhaust gases passing through the exhaust; manifold-5 4 expands the liquid fuel vaporizes a. part" of this fuel.v This expantank 3. The inertia'v of the fuel expelled. from the' bott-le 5 'andthe condensation of the expelling'vapor parts' of the'pump P creates a vacuum behind the expelled columnof'fuel `which ,re-

. duceslthe pressure on valve V1, permittingit to be closed by' its spring, and raises or opens valve `V to draw inta fresh cool supplyof fuel to the pump P.-

The-.fuel transferring action .is continuouspulsatingproviding the inner properlyI adjiisted withinthe y bottle' 5. toi the aiixiliary tank 19 as it reaches tlie'eooler` ,in 1thejbottle 5 andin the .vapor trap 23 and ico member 23 is I d 'by pump f v ier P, the fuel consists of alternate strata of liquid and vapor. It is to ensure proper proportioning of the vapor strata to ,the liquid strata thatl the inner vapo-rtrap member 23 is made adjustable in the pump bottle 5. If vthe 'vapor strata were too large in volume, lrelativel to the liquid stratal suffi-` cient liquid fuel would not be. transferred to the auxiliarytank lQlto keep'i'the engine run-V ning, .and the yauxiliary tank would eventually' be emptied and the-engine stopped. Particular attention is directed to the arrangement-.of the `inner pump member -23 with its closed vaporftrap end 25 directly .in the path of the cool-.liquidffuel drawn from thermain sup'plytank 3, Which causes a rapid condensation of vapor remaining in the pump a'fter expulsion of a strata-of liquid therefrom -Avith a consequent quick vincrease 1n vacuum tol dravv'vfuel y"from 'the main It'Will beapparent from the drawing'that :adjustment of the inner member 23 vintoor 'out ofthe exhaust duct 4 Will'cause variation heat-'of the manifold justment Willcontrol of the expelledI strata of'liquid fuel'a'nd the lfuelexpel'ling strata ofvapor.

inv the quantities of fuel vaporized by the gases, and that this adthe relative, proportions Obviously, various changes and modicationsmay be made in the apparatus described lherein Without departing from the spirit of `the'invention andthe scope of the appended claims. i v l v Having thus disclosed myinvention, What 'Inclaim as new and desire to secure by LettersPatent 'is z Y i V'1. A thermal pump` 'including 'a rtubular receptacle having valved intake and discharge connections,a tubularshell open at onefend and 'closed at its other and arranged in said-receptacle topi-Ovide a relatively con- `stricted passage between the' shell andthe revceptacle andiy a sealed vaporv chamber Within vthe shell when the receptaclejis suppliedwvith "liquid, and meansffor adjusting said shell in said receptacle.'

2. A fuelpum'ping,system 'for an internal i lcombustion engmecomprising in combination With the exhaust pipe of the engine, an

open' fuel'supply tank, a thermally operated pump having a chamberdisposed in Ipart Within `sai d vexhaustpipe, a feed pipe'lea'ding fromthe fuel supply tank to the pumping chamber, a check valve in said pipe, a dislchar'ge pipe also communiczpltingv Withsaid chamber, al check vvalve in said discharge i pipe, ia reservoir for receiving fliquidfdischarged by said discharge pipe, a -feed'connection :from said reservoir to the carburetor of the engine, and an overflow ipe leading from* ythe kreservoir to the supp y tank.

Inka liquid-'fue'lpumping Vapparatus of the class describejdfthe combination Withfa source of liquid-fuel supplyyand the exhaust Lef/'6,751 i manifold of an engine, of a pumping bottle having its closed end disposed Within said manifold, valved intake and discharge connections communicating with theupper end of the bottle, and a tubulary shell closed at one end and openat the otherand arranged kWithin' the bottle to provide 'a liquid sealed vapor chamber when the` bottle is supplied with:liquid-fuel.v u

4. In a liquid-fuel pumping apparatus of `ithe classfdeseribed, the combination With a source of liquid-fuel supply and the exhaust u Y manifold v of an engine,J of a fpumping bottle having'its closed endfd-isposed Within said y manifold, acap fitted toithe open vend of said fbottle, v-alved intake and discharge connecltions -communicatingvvith vsaid cap, and a tubular shell closed rat :one yend and `openy at the other and arranged Within the'bottle to providel a fliquid sealed Vapor chamber when thelbottle is supplied -vvi'th'lliquichfuel 5. In a 'liquidfuel' pumping-apparatusof l'the cl-ass described'the'combination with a source of liquid-fuel supply andV the exhaust f manifold of an engine,xof.a pumping bottle ihaving=itsclosedven`d disposed Within said manifold, a cap fitted to the open end. of said bottle, valved intake and'dischargeeonnectionscommunieating With said cap, anda tu- *bular shell carriedl by said cap and suspended Within the bottle to provide a relatively constricted space between the shell andthe bot-"5 tleand also yprovide a liquid sealed Vvapor chamberwhen the bottle is supplied f-vvithliql l6. In a liquidfuelpumping apparatus of "the classdescribed, the-combination Witha 4source of liquid fuel supply and the exhaust l sealed' vapor chamber Whenthe bottle is supplied with liquid-fuel. i

' '17. A` thermalpumpof the class described including atubular receptacle havingfvalved intake and discharge connections, and atu- ,bularshell open' at oneend and closed atthe other and arranged Within the tubular receptacle to provide a relatively constricted pasn sage Abetween-the shell andthe receptacle and also provide a liquid sealed `vapor chamber Within `theushell when the receptacle is supplied With-fluid. u f

v8. Ina fluid vfeedingdevice of the class described, theycombination Witha -source of heatand a source of fluid supply,a pumping bottlehaving its'closed end vdisposed Within the lzoneof heat-inluence, valved intake and discharge connections communicating With the open end of the bottle, and a tubular chamber adapted to discharge toward the pumping shell arranged Withinthe bottle and bottom of the bottle When the eeet of heat having a closed end and an open end, the said on the bottom of said bottle expands the 10 open end being disposed toward the bottom vapor in said vapor chamber.

5 of the bottle and being sealed by liquid With- In testimony whereof I have signed my in the bottom thereby cooperating with the name to this speeiation. said closed end to provide a sealed vapor LESTER E. VAN HISE. 

